Oh good! I wasn't expecting that you would watch my thread (the advice you gave already was helpful), I had just read over my response and thought it might have come off as rude. I do really appreciate the help. :)

Hey I just wanted to apologize if my response to your thoughts on Link's fins came off as rude at all. I have been pretty adamant for a while that the filter couldn't possibly be the problem, but I am most likely going to move him into a new tank without one to see if that helps. I suppose it was more of me wanting him to stay in his nice big tank than really thinking about all the possibilities. So again, I'm sorry if I seemed rude, and thank you for the extra nudge I needed to look at a different solution. :)